Elevator



(ModeL) 3 Sheets-Sheet 1. G. FALK.

ELEVATOR.

No. 248,851. Patented Nov. 1,1881.

INVENTOR i ATORNEY I NESSES r, i W I 3- Sheets-Sheet 3.

(ModeL) G. FALK. ELEVATOR.

N. PETERS Phnlo-Lil|wgmphen Washinglar. D. C.

Uivrrnn STATES PATENT Orrrcie.

GUSTAF FALK, OF PERU, ILLINOIS.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 248,851, dated November 1, 1881,

Application filed May'flfi, 1881.

To all whom it may concern Be it known that I, GUSTAF FALK, ofPeru, in the county of La Salle and State of Illinois, have invented certain new and useful Improvements in Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being bad to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in elevators, the object being to provide devices to automatically stop and retain the elevatorcar at any point between the two termini of.its track.

With this object in view my invention consists in certain details of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure l is a perspective view of an elevator constructed in accordance with my invention. Fig. 2 is a plan view thereof. Fig. 3 is a view in side elevation, and Fig. 4. is a modification.

AArepresent the elevator-guides, having an elevator-car interposed between them. The sections B, forming the top and bottom of the said car, are joined together by rods D, the upper ends of which are bent to form loops or eyes E, to which chains F or equivalent devices are secured. The said chains are of equal length, and are each connected with the hoist-rope G, adapted to run over suitable pulleys. (Not shown.) Guide-bars H H, joining the top and bottom sections of the car, are located on each side thereof and inclose the elevator-guides A and steady the car. Angular braces I form a part of the car frame-work and enable it to resist lateral strain. Frames J, attached to opposite edges of the top section of the car, and provided with horizontal cross-pieces L, support in vertical adjustment two bolts, M, upon which are mounted levers M, adapted to have a diagonal movement away from and toward each other, and to be engaged with opposite sides of the guides A A. The inner ends of the said levers, which are located on each side of pyramidal blocks N, are attached by chain or other connections, 0, to the hoist-rope G, and are adapted to be raised thereby to dis- (MotlcL) their outer ends in constant engagement with the guides and the car at rest. This, however, does not happen except when the hoistrope is suddenly broken or slacked, for ordinarily the car audits freight will weigh heavily enough on the rope to overcome the force of the spring-pressure, and to elevate and converge the inner ends of the levers, and to hold the outer ends of the levers out of engagement with the guides. When the rope is broken or slacked, the counteracting force being removed, the springs will at once depress theinner ends of the levers, which are diverged by following the outwardly-inclined planes of the blocksan operation causing the outer ends of the levers to converge and engage with the guides.

In order that the frictional engagement between the guides and levers may be instantaneous and positive, the opposite faces of the guides and the inner faces of the outer ends of thelevers may be serratedor otherwise adapted to increase friction, or the construction shown in Fig. 4 may be resorted to. This modification shows V-shaped grooves cut in the opposite faces of the guides, while the levers themselves are provided with V-shaped points adapted to fit into the grooves in the guides, and thus to increase the area of frictional contact between the two parts.

It is apparent that the application of myinvention is not limited to any particular construction of elevator-car, or to elevators operated by any one of the many methods employed, but that it may be applied to almost any of the different varieties.

I would further have it understood that I do not limit myself to the particular construction shown and described, but hold myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my inveution.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In an elevator, the combination, with a guide, of levers attached to the elevator-car guide, of two levers attached to the elevatorcar and respectively arranged to engage with the opposite sides of the guide, a pyramidal block located between the inner ends of the levers which are connected with the hoist-rope of the car, and springs arranged to exert a constant tendency to diverge the inner and converge the onter ends ofthelevers, substantially as set forth.

3. In an elevator, the combination, with a guide and an elevator-car, of frames adapted each to support two bolts, levers pivotally mounted on said bolts, pyramidal blocks located between the inner ends of the levers,

springs exerting a constant tendency to converge the outer and diverge the inner ends of the levers, and connection between the inner ends of the levers and the hoist-rope, substantially as set forth.

4. In an elevator, the combination, with a guide and an elevatorcar, of frames secured to the car and adapted each to support two bolts, levers pivotally mounted on said bolts, pyramidal blocks located between the inner ends of the levers, springs adapted to engage with the upper faces of the said levers, and connection between the inner ends of the levers and the hoist-rope, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 6th day of May, 1881.

GUSTAF FALK.

Witnesses:

GEO. PERRY, J OHN BUoHENoUGH. 

